chore: Move `java_path` to General Configuration

[berntpopp]

Description

Relocate the java_path parameter from the Kestrel-specific configuration to the general configuration file. This change centralizes Java-related settings, enhancing consistency and maintainability across different components of the project.

Motivation

Having java_path in the general configuration allows for easier management of Java dependencies and ensures that all parts of the project reference the same Java executable path. This reduces redundancy and potential configuration mismatches.

Acceptance Criteria

• Remove java_path from kestrel_config.json.
• Add java_path to the main configuration file (e.g., config.json).
• Update all scripts and modules to reference java_path from the general configuration.
• Ensure existing functionality remains unaffected after the change.
• Update documentation to reflect the new configuration structure.